Researchers are exploring hole mobility in compressively strained germanium grown on silicon as a pathway to improving next-generation electronic performance.

A team from the University of Warwick and the National Research Council of Canada has now set a new milestone: the highest hole mobility ever recorded in a material compatible with standard silicon chip fabrication.

While most modern semiconductor devices are still built from silicon, shrinking transistors continue to push thermal and physical limits. This challenge has renewed interest in germanium—a material used in early transistors in the 1950s—because of its superior electronic properties and its potential to integrate with existing silicon manufacturing processes.

Figure 1. 1950s Material.

In a study published in Materials Today, researchers led by Dr. Maksym Myronov engineered a nanometer-scale, compressively strained germanium layer grown directly on silicon. This structure allows charge to move through the material significantly faster than in silicon, without requiring new production infrastructure.

“High-mobility semiconductors like gallium arsenide remain costly and cannot be integrated with mainstream silicon technology,” says Dr. Myronov. “Our compressively strained germanium-on-silicon (cs-GoS) quantum material offers record-breaking mobility while remaining scalable for industrial use—paving the way for quantum and classical large-scale circuits.” Figure 1 shows 1950s Material.

The breakthrough relies on precisely tuning strain within an ultra-pure germanium crystal layer [1]. When tested, the material achieved an unprecedented hole mobility of 7.15 million cm²/V·s—dramatically higher than the roughly 450 cm²/V·s typical of commercial silicon—suggesting the potential for faster operation with far lower power loss.

“This achievement sets a new standard for charge transport in group-IV semiconductors,” notes Dr. Sergei Studenikin of the National Research Council of Canada. “It represents a promising route toward energy-efficient electronics and silicon-compatible quantum technologies.”

The findings open avenues for ultrafast, low-power chip architectures, with potential applications in quantum information processing, spin-based qubits, cryogenic control systems, data center hardware, and next-generation AI computing.

References:

1. https://scitechdaily.com/the-1950s-material-making-a-massive-comeback-to-transform-modern-computing/

Cite this article:

Keerthana S (2025), A 1950s Material Is Making a Major Comeback—and Could Redefine Modern Computing, AnaTechMaz, pp.307